Hatchway-operating device



(No Model.)

P. BYRNE.

HATGHWAY OPBRATINGDBVIGB. Y No. 365,791. Patented July 5, 1887..

Nv PETERS, PlwtLllhngmpher, washington. Dc,

UNITED STATES PATENT Prien.

PATRICK BYRNE, OF NASHVILLE, TENNESSEE.,

HATCHWAY-OPRATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 365,791, dated July 5,1887.

Application tiled July 23, lSEG.

To @ZZ whom, it may concern:

Be it known that I, PATRICK BYRNE, a citizen of the United States,residing at Nashville, in the county of Davidson and State of Tennessee,hav-e invented a new and useful I m provementin HatchwayOperatingDevices for Elevators, of which thefollowing is a specication.

My invention relates to an improvement in elevators, and moreparticularlyto the hatchway-doors of the same; and the object of myinvention is to provide balanced elevator-doors for the hatchway andmechanism for automatically opening and closing the same as theelevatoi.1 ascends or descends; and my invention consists in thepeculiar construction and combination of devices, that will be morefully set forth hereinafter, and particularly pointed out in the claim.

In the drawings, Figure l is a` vertical sectional view of an elevatorprovided with balanced automatically operating hatchwaydoors embodyingmy improvements. Fig. 2 is an enlarged detail view of one of theoperating-arms. Fig. 3 is a detailed end elevation of the same. e l

A represents the usual vertical guidevposts.

B are the iloors, C the hatchways, and D are the doors to close thehatchwa'ys, the said doors being pivoted or hinged at their outer edgesto the sides of the hatchway, as at E, and meeting at their inner edgescentrally in the hatchways when the doors are closed ,as shown in thelower portion of Fig. l. i

On the inner sides of the vertical posts `A, immediately above thehatchways, are made vertical recesses F, which are of sufficient heightto admit and receive the doors D when the latter are open, as shown bythe dotted lines in Fig. 1, so that the inner sides of the doors will beflush with the inner sides ofthe posts.

G represents the elevator cage or platform, the sides of which that bearagainst theinner sides of the posts are provided with vertical metallicstraps or tracks H. The lower ends of the said tracks are bent under thebottom ofthe cage or platform, and are secured thereto by means ofvertical bolts l', and the said tracks extend above the cross-beam K atthe upper end of the cage or plat-form, incline upw ardly from the endsof the said beam, and meet Serial No. 208,877. (No model.)

directly over the center thereof, as shown. A vertical brace-bar, L,extends upwardly from the beam K, and is connected to the centralportion of the strap or guide above the cageA M represents theelevatingrope, which is operated by the usual wellknovvn mechanism toraise or lower the cage. Extending across the bottom of the cage is aguide-track, N, and at the ends of the said track, at the sides of thebottom of the case, are journaled anti-friction rollers O, which aremounted in suitable frames or castings, I.

At a suitable distance above each hatchway and to the posts A aresecured outwardly-pro jecting horizontal brackets R,to the outer ends ofwhich are pivoted segmental rockingleverarms S, the said arms havingsides .S and S'l arranged at an angle of about sixty degrees withrelation to each other, and connected by a curved side, S3. The side S2proj ccts slightly beyond the curved side S3, and is provided with ananti-friction roller, S".

T representsacircularweight, which. isslotted on one edge, andis therebyadapted to be tted to the curved side of the lever-arm, and is providedwith a setscrew, T', the function of which is to rmly secure the weightto the said side of the levcr-arm. Near the point where the sides S andS" of the lever-arms meet is attached a connectingi'od, U, whichextendsto one of the folding doors and is connected thereto, as at U.

The operation ot' my inv'entionis as follows: The doors D are normallyclosed in a horizontal position over the hatchways, and the upperport-ions of the curved sides and of the angular sides S2 of thelever-arms project inwardly from the guideposts into the vertical pathtraversed by the cage or platform. When the latter is elevated, theguide at the upper end of the cage strikes against the under sides ofthe doors, raising them to a vertical position and' forcing them intothe recesses F of the guide-posts. The said doors are provided on theirunder or innersides with anti-friction rollers D, which bear against theguide or strap H.

It will be noted that the operation oli opening the doors to a verticalposition causes the rocking levers S to be moved through a quarter ot' acircle, thereby causingthem to be entirely withdrawn vfrom the innersides of main in contact with the bottom of the cage,

the guide-posts, so as not to project into the pathway ofthe cage.` arein this position, their friction-rollers S4 are just lush with the innersides of the guideposts, and as the cage continues to rise the strap IIbears against thesaid rollers and keeps the levers R in that position,so as to cause them to keep the doors open until the vertical track ofthe cage entirely clears the rollers S4.

It will be observed that when the doors are in ahorizontal position thelevers S projectinwardly, thereby throwing all their weight upon theinner sides of their fulcrums, and that the rods U are attached slightlybeyond the outer sides of the fulcrums, thereby causing the projectinginner portions of the levers to counterbalanee the doors. The weights T,which are attached to the levers, maybe oi' any necessary weight, inorder to cause the levers to exactly counterbalance the doors, as theweight of the doorsl for the hatchways of elevators varies in differentcases. As soon as the ascent ofthe cage or platform brings the rollersS* to the bottom thereof, the weight of the levers S causes them toreverse their movement and partly closethe doors. The rollers S4 reandcontinue to bear and travel under the track N of the cage during aportion of the distance traversed by the cage, thus causing the doors tobe closed gradually and at aspeed exactly equal to the speed of theelevator. This prevents the doors from closing the hatchways with abang, and thus avoids noise, and

When the lever-arms of the doorsbear against the vertical straps H,thereby keeping the doors open, andwhen the upper inclined portions ofthe strap reach the said rollers they canse the doors to be graduallyclosed, as before.

Having thus described my invention, I claimf f The combination, with theelevating cage or platform G, of the pivoted segmental rocklevers S,comprising the arms SS2 and curved arms S3, the arms S2, projecting intothepath of the cage or plat-form, the weight T, adj ustable along thecurved arms S3, and the rods U, connect-ing the doors with the arms Si,as set forth.

In testimony that I claim Vthe foregoing as myown I have hereto affixedmy signature in presence of two witnesses.

- PATRICK Brenn.

I-I. B. GRAY.

